Those jars first I have received free of charge as a kindness of a seller whom I contacted in relation to my homemade product which I would like to put on the UK market. I received the parcel with different sample metal tins, with strong tightly closing lid and sturdy build.I realise that it might be a good idea to start from lip balms and natural warming remedies which are made very easily and need small tins so I went back to amazon and ordered more of those tins. Delivery came before the expected time, tins were packed in the envelope and send to me Royal mail 48. Tins are really great, and I am happy to found a quality product with reasonable prices, 10ml is more than enough for what I currently work on but I am sure I will go back to this seller for more.